21392199055 has 16 divisors (see below), whose sum is σ = 26265951360. Its totient is φ = 16720445088.

The previous prime is 21392198987. The next prime is 21392199089. The reversal of 21392199055 is 55099129312.

It is a cyclic number.

It is not a de Polignac number, because 21392199055 - 2³¹ = 19244715407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21392198996 and 21392199014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174357 + ... + 270526.

It is an arithmetic number, because the mean of its divisors is an integer number (1641621960).

Almost surely, 2^21392199055 is an apocalyptic number.

21392199055 is a deficient number, since it is larger than the sum of its proper divisors (4873752305).

21392199055 is a wasteful number, since it uses less digits than its factorization.

21392199055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445110.

The product of its (nonzero) digits is 218700, while the sum is 46.

The spelling of 21392199055 in words is "twenty-one billion, three hundred ninety-two million, one hundred ninety-nine thousand, fifty-five".